I really like the way you worked out the template here, it looks very good.
I'm liking the front a lot, but I think the back could have a better organization, but it's not bad at all.
Good job, and yeah, it's definitely your best job. Keep at it, bud! :)

Oh, and another thing. On the spine, I think you should've used a simple sans-serif font, like in most official boxes. It's no big deal, but I thought I might point out that as well. But yeah, it's still really good. :D